Working With Button

Screen Shots:

activity_main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Developed by Shrikant"
        android:textAppearance="?android:attr/textAppearanceSmall" />

     <Button
        android:id="@+id/clickButton"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="Click Me"
        android:layout_gravity="center"
        android:layout_marginTop="50dp"
        android:textSize="20dp"
        />

</LinearLayout> 


MainActivity.java:

package com.shrikant.workingwithbutton;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.view.View.OnClickListener;
public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button clickbtn=(Button)findViewById(R.id.clickButton);
        clickbtn.setOnClickListener(new OnClickListener() {
           
            @Override
            public void onClick(View arg0) {
                Toast.makeText(getApplicationContext(), "Button is clicked", Toast.LENGTH_SHORT).show();
             
            }
        });
    }
  }